1165860947 has 2 divisors, whose sum is σ = 1165860948. Its totient is φ = 1165860946.

The previous prime is 1165860863. The next prime is 1165860973. The reversal of 1165860947 is 7490685611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1165860947 - 2²⁰ = 1164812371 is a prime.

It is not a weakly prime, because it can be changed into another prime (1165860347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582930473 + 582930474.

It is an arithmetic number, because the mean of its divisors is an integer number (582930474).

Almost surely, 2^1165860947 is an apocalyptic number.

1165860947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165860947 is an equidigital number, since it uses as much as digits as its factorization.

1165860947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 1165860947 is about 34144.7059878980. The cubic root of 1165860947 is about 1052.4842002206.

The spelling of 1165860947 in words is "one billion, one hundred sixty-five million, eight hundred sixty thousand, nine hundred forty-seven".